Searchable abstracts of presentations at key conferences in endocrinology

ea0081p174 | Pituitary and Neuroendocrinology | ECE2022

The positive feedback exerted by mtor inhibitor everolimus in pituitary neuroendocrine tumoral cells is reverted by cabergoline co-treatment

Mangili Federica , Esposito Emanuela , Treppiedi Donatella , Catalano Rosa , Marra Giusy , Di Muro Genesio , Maria Barbieri Anna , Locatelli Marco , Gerardo Lania Andrea , Spada Anna , Arosio Maura , Mantovani Giovanna , Peverelli Erika

The mTOR inhibitor everolimus has been shown to display antimitotic effects on diverse neoplasms, including pituitary neuroendocrine tumors (PitNETs); however, its effect is reduced by an escape mechanism that increases AKT phosphorylation (P-AKT) leading to survival pathway activation. Dopamine receptor type 2 (DRD2) reduces p-AKT in some non-functioning PitNETs (NF-PitNETs) and in lactotrophs MMQ cells, through a α-arrestin 2-dependent mechanism. This study aim...